Door closer



E. STOCKER DooR CLOSER Filed Sept. 8. 1925 Patented May 24, 1927.

UNITEDv STATES ERNST STOCKER, OF LUZERN. SEVITZERLAND.

DOOR CLOSER.

Application led September 8, 1925, Serial No. 54,972, and in SwitzerlandSeptember 11, 1924.

The invention relates to a new and improved door-closer adapted to heused for doors` gates and so on.

The main olijeet of the invention is to provide a most simple andetileetive deviee ot this eharaeter which is inexpensive in ronstruetionand whieh ean be readily applied to the eonventional types ot doors.

further ohjeet ot' niy invention consists' in the provision oi' adoor-eloser n'hieh does not ofiler any apprcafiahle resifftanee when thedoor is opened and `which needs no readjustlnent after having been srtonee.

Vi'urther oliieet ot the in\entiou is to provide a door-eloser whieh ermhe readily adapted to any size ot' doors to elose the same gentlywithout jamming.

In the drawings aeeon'lpanying and torming part of the presentspeeifieation`r l have shown in detail tivo ot the several eonvenient`forms ot embodiment ot the invention, which will he set forth fully inthe followingl description.

It Will he obvious therefore that I do not restriet myselie thereto; Imay depart therefrom in several respects Within the scope ot theinvention included in the claim following said description.

Referring to the drawings;

Fig. 1 is a sectional side elevation of the first example ot mydoor-closer,

Fig. .2 is a top view thereof,

Figs. 3 and 4 show the means to attaeh the door-einser in a top and in aside View,

Fig. 5 shows the seeond form of eonstruetion of the door-closer in a`sectional side elevation` Fig. (i is a top view thereof,

Figs. 7 to 14 show diagrammatieally the manner to attach the door-closerto the door and to the door-easing.

Like ehararters refer to like parts throughout the several figures.

The door-closer shown in Figs. 1 to 4 eomprises an angular support Kwhich is rigidly fixed hy means of screws to the door T. On thehorizontal member of the support K a. eireular plate E is tiXed by meansof a sei-ew (t engaging a serew-threaded here ot a stud IY) rigidlyeonneeted to the plate E. The plate E is provided with a eireular rowof'` holes lVt and the support K is provided with a pin N projecting inone of said holes M securing the plate E against rotation. The stud D isprovided with a radial slot C and into this slot the inner endpieee of ablade spring F projects. The outer end of the spiral spring F is rigidlyeonneeted to a easing H hy means ot' a sel-ew Q and a nut R. To theeasing H a guide pin J is rigidly fixed at its centre projecting intothe bore of the stud l) and rotatably mounted therein moreover theeasing H is fastened to an arm A. The arm is eonneeted to an angle pieeeL h v means ot a link Z. The pier-e L is fastened to the door easing byscrews and one memhrr L is provided with a numher of holes; L". rlhelink Z engages with one ot its endsy one ot' the holes L and with theother end a hole l in the arm A. By opening or closing the door theeasing H with the arm A turns around the stud l) as its pivot.

The parts l( and L ot the door-closer may he. fixed to the doorewinel`and to the dooreasing in the manner shown in Figs. 7 to 14.

ln the arrangement shown in Fig. 7 the support is fixed to the door-WingT and the angle piet-e L is tiXed to the door-easing; the pieee L isarranged between the support. l( and the hinges of the door it the dooris elosed. lt' the distant-e between support l( and hinges O is denotedby r1. and the angle between the parts A and Z is denoted hy B it thedoor is elosed and B' if the. door is ol'iened, it' l denotes the forceof the spring F measured at the point B and Z the foree arting in thedirection ot' the link Z then the torque tending to elose the door is Ifby opening the door its angle with the door easing increases. the valueof (siii B) P increases and moreover the foree P increases with theincrease of the angle B but in a larger measure while the distance adecreases (see position of the door and the door-closer in broken linesFig, 1). The foree tending to elose the door ean be kept at least veryapproximately eonstant hy elosing a spring F of proper strength and thesaid fol-ee is ehosen to he just a little above that to overeome thefriet ion.

vThe relative position of the points ot attachment of the parts K and Lon the door and on the door-casing may be as shown in Fig. 8. Thesupport K fixed to the door is

